Universal Wiser Publisher 2025. Retraction Note to "Improvement of Polypropylene (PP)-Chitosan Nanoparticles (CNP) for Advanced Bio-Composite" [Advanced Energy Conversion Materials, Volume 5 Issue 1 (2024), 117-132]. Advanced Energy Conversion Materials. 6, 1 (Apr. 2025), 120. DOI:https://doi.org/10.37256/aecm.6120257031.